Abstract
This paper presents a temperature sensor based on a frequency-to-digital converter with digitally controlled process compensation. The proposed temperature sensor utilizes ring oscillators to generate a temperature dependent frequency. The adjusted linear frequency difference slope is used to improve the linearity of the temperature sensor and to compensate for process variations. Furthermore, an additional process compensation scheme is proposed to enhance the accuracy under one point calibration. With one point calibration, the resolution of the temperature sensor is 0.18°C/LSB and the maximum inaccuracy of 20 measured samples is less than ± 1.5°C over a temperature range of 0°C ∼ 110°C. The entire block occupies 0.008 mm2 in 65 nm CMOS and consumes 500 μW at a conversion rate of 469 kS/s.
| Original language | English |
|---|---|
| Article number | 6466399 |
| Pages (from-to) | 2241-2248 |
| Number of pages | 8 |
| Journal | IEEE Transactions on Circuits and Systems I: Regular Papers |
| Volume | 60 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2013 Feb 26 |
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Keywords
- Frequency-to-digital converter
- process variation compensation
- temperature sensor
ASJC Scopus subject areas
- Electrical and Electronic Engineering
Cite this
A 0.008 mm2 500 μw 469 kS/s frequency-to-digital converter based CMOS temperature sensor with process variation compensation. / Hwang, Sewook; Koo, Jabeom; Kim, Kisoo; Lee, Hokyu; Kim, Chulwoo.
In: IEEE Transactions on Circuits and Systems I: Regular Papers, Vol. 60, No. 9, 6466399, 26.02.2013, p. 2241-2248.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A 0.008 mm2 500 μw 469 kS/s frequency-to-digital converter based CMOS temperature sensor with process variation compensation
AU - Hwang, Sewook
AU - Koo, Jabeom
AU - Kim, Kisoo
AU - Lee, Hokyu
AU - Kim, Chulwoo
PY - 2013/2/26
Y1 - 2013/2/26
N2 - This paper presents a temperature sensor based on a frequency-to-digital converter with digitally controlled process compensation. The proposed temperature sensor utilizes ring oscillators to generate a temperature dependent frequency. The adjusted linear frequency difference slope is used to improve the linearity of the temperature sensor and to compensate for process variations. Furthermore, an additional process compensation scheme is proposed to enhance the accuracy under one point calibration. With one point calibration, the resolution of the temperature sensor is 0.18°C/LSB and the maximum inaccuracy of 20 measured samples is less than ± 1.5°C over a temperature range of 0°C ∼ 110°C. The entire block occupies 0.008 mm2 in 65 nm CMOS and consumes 500 μW at a conversion rate of 469 kS/s.
AB - This paper presents a temperature sensor based on a frequency-to-digital converter with digitally controlled process compensation. The proposed temperature sensor utilizes ring oscillators to generate a temperature dependent frequency. The adjusted linear frequency difference slope is used to improve the linearity of the temperature sensor and to compensate for process variations. Furthermore, an additional process compensation scheme is proposed to enhance the accuracy under one point calibration. With one point calibration, the resolution of the temperature sensor is 0.18°C/LSB and the maximum inaccuracy of 20 measured samples is less than ± 1.5°C over a temperature range of 0°C ∼ 110°C. The entire block occupies 0.008 mm2 in 65 nm CMOS and consumes 500 μW at a conversion rate of 469 kS/s.
KW - Frequency-to-digital converter
KW - process variation compensation
KW - temperature sensor
UR - http://www.scopus.com/inward/record.url?scp=84883450948&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84883450948&partnerID=8YFLogxK
U2 - 10.1109/TCSI.2013.2246254
DO - 10.1109/TCSI.2013.2246254
M3 - Article
AN - SCOPUS:84883450948
VL - 60
SP - 2241
EP - 2248
JO - IEEE Transactions on Circuits and Systems I: Regular Papers
JF - IEEE Transactions on Circuits and Systems I: Regular Papers
SN - 1549-8328
IS - 9
M1 - 6466399
ER -